Gun-sight.



- J. A. DITTEMORL GUN SIGHT.

APPLICATION FILED DEC-5| I915-- F 1,256,987.- Patented Feb. 19, 1918.

J5. lzitiemore JAMES A. DITTEMORE, OF ST. JOSEPH, MISSOURI.

GUN-SIGHT.

Specification of Letters Patent.

Patented Feb. 19, 1918.

Application filed December 5, 1916. Serial No. 135,146.

To all whom it may concern:

Be it known that I, J AMES A. Drr'rmronn, a citizen of the UnitedStates, residing at St. Joseph, in the county of Buchanan, State ofMissouri, have invented certain new and useful Improvements inGun-Sights; and I do hereby declare the following to be a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same.

This invention relates to gun sights.

The object of the invention is to provide a gun sight, which, inprinciple may be used upon guns of large or small caliber, and whichpermits the covering of the target without losing the vision of theentire target.

A further objectof the invention is to provide a gun sight which may beused with equal facility either in daylight or darkness. To this end, Ihave constructed a sight which involves the use of both eyes in sightingthe gun or rifle, and the alining of two intermediate points with thetarget within the vision of one eye.

\Vith the above objects in view and such others relating to theparticular construe tion of the device as may hereinafter appear, myinvention will now be fully set forth and described, reference being hadto the accompanying drawings.

In the drawings Figure 1 is a longitudinal section through the sight,

Fig. 2 is a section on line 2-2 of Flg. 1,

Fig. 3 is a section on line 33 of Fig. 1, and

Fig. 4 is a. diagram illustrating the principle upon which my inventionis based.

Referring more particularly to the drawings, 1 indicates a metal tube ofsuitable length and diameter which is mounted upon a rifle or gun barrelalong the line of sight. The front end of the tube 1 is closed by anopaque diaphragm 2 so that the vision does not pass therethrough. A.comparatively short distance behind the opaque diaphragm 2 is mounted asecond diaphragm 3 which thereby sub-divides a small chamber at at thefront end of the tube 1. The diaphragm 3, as shown in Fig. 3, has formedin its upper portion, or on its edges, a sightopenmg 5, the sightopening 5 being in the line of sight of the gun. Alined with the opening5 1s a sight opening 6 similarly formed in a diaphragm 7 which closesthe rear end of the tube 1. As shown in Fig. 2, the opening 6 is ofsmaller diameter than the opening 5.

Mounted within the chamber 1 is a light source 8 which may be a smallelectric light, a phosphorescent or other luminous point, or any otherradiant element which will faintly illuminate the opening 5 in thediaphragm 3. In order to cut down the luminosity, and also to provide acontrasting illuininated point, the opening 5 may be covered with atransparent diaphragm 9 of red or other suitably colored material. Bythis arrangement, when the sight is used in the daytime, the red orother contrasting light point may be readily distinguished from thesunlight.

The construction of the above described sight follows the principle,that, if the eyes are focused on a distant object, as, ain Fig. -1, andan object o is held in the line of vision between one eye and the objecta, the object 5 apparently does not obstruct the vision, or, in otherwords, apparently one sees through the object I). Also, if a thirdobject c is placed in the line of vision between 6 and a, there islikewise no apparent obstruction of the vision. Apparently, then theobject a is seen through the objects I) and 0, and if with both eyes onthe object a as a target, the objects I) and 0 are used as the sightelements on a gun, it is apparent that when the objects I) and c arealined between the target or object a and one eye, the gun must bedirectly trained upon the target. Substituting now, the opening 6 forthe object b and the luminous opening 5 for the object 0, it is evidentthat when one eye is kept upon the target, and the other eye keeps invision the red spot of light within the tube 1, and the gun ismanipulated until the red spot centers upon the target, the gun will besighted or trained upon the latter.

In this manner, a very accurate, and a dependable sight is provided foruse either in the daytime or at night when it is only possible tooutline the target. The illuminated opening 5 not only renders the sightvisible but constitutes one of the sight elements, and obviously, theluminous point cannot be seen without alining the opening 6 with theeye. lVhen this is done, and the gun manipulated until the light centersupon the object to be fired at, the gun must thus, of necessity stand insighted position.

What I claim as my invention is 1. A gun sight, comprising incombination, a tube having an illuminated chamber at its forward end,having a pair of diaphragms provided with openings on a line parallel tothe axis of the tube, and means in the axis of the tube for1llu1ninating the forward openin 2. A gun sight, comprising incombination, a tube having its forward end closed, a diaphragm at therear end of the tube provided with a sight opening, an intermediatediaphragm transversely arranged in the tube and provided with anopening, said diaphragms being so arranged that a line joining thecenters of said openings lies parallel to the axis of the tube, andmeans for illuminating the second opening.

3. A gun sight, comprising in combination, a tube having its forward endclosed, a diaphragm at the rear end of the tube and having an openingformed therein, an inter mediate diaphragm transversely arranged to thetube and forming with the closed end thereof a light chamber, saidintermediate diaphragm having an opening, said diaphragms being soarranged that a line joining the centers of said openings lies parallelto the axis of the tube, and a light source in the light chamber forilluminating the second opening.

i. A gun sight, comprising in combination, a tube having its forward endclosed, a diaphragm at the rear end of the tube, an intermediatediaphragm near the front end of the tube, and forming an illuminatingchamber With the closed end of the tube, said diaphragms having openingsin a line parallel to the aXiS of the tube, and means for illuminatingthe opening in the intermediate diaphragm.

5. A gun sight, comprising in combination, a tube having a closed end, adiaphragm at the rear end of the tube, a for- Ward diaphragm forming anilluminating chamber with the closed end, said diaphragms havingopenings on a line parallel to the axis of the tube, the opening in theforward diaph agm being illuminated from the front of the latter.

In testimony whereof, I afiix my signature, in the presence of twowitnesses.

JAMES A. DITTEMORE.

Witnesses:

J R. Lnr'rwlorr, J 0s. VEREsINSKI.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. O.

